Prometio
61
Pm
Grupo
Neniu
Perio
6
Bloko
f
Protonoj
Elektronoj
Neŭtronoj
61
61
84
Ĝeneralaj Propraĵoj
Atoma Nombro
61
Atommaso
[145]
Amasa Nombro
145
Kategorio
Lantanoidoj
Koloro
Arĝento
Radioaktiva
Jes
Named after the Greek Prometheus, who, according to mythology, stole fire from heaven
Kristala Strukturo
Neniu
Historio
The existence of an element between neodymium and samarium was first predicted by Czech chemist Bohuslav Brauner in 1902.
Promethium was first produced and characterized at Oak Ridge National Laboratory in 1945 by Jacob A. Marinsky, Lawrence E. Glendenin and Charles D. Coryell.
It was produced by the separation and analysis of the fission products of uranium fuel irradiated in a graphite reactor.
Promethium was first produced and characterized at Oak Ridge National Laboratory in 1945 by Jacob A. Marinsky, Lawrence E. Glendenin and Charles D. Coryell.
It was produced by the separation and analysis of the fission products of uranium fuel irradiated in a graphite reactor.
Elektronoj per ŝelo
2, 8, 18, 23, 8, 2
Elektrona Agordo
[Xe] 4f5 6s2
Promethium is the only lanthanide that has no stable isotopes
Fizikaj Propraĵoj
Fazo
Solido
Denso
7,26 g/cm3
Fandpunkto
1315,15 K | 1042 °C | 1907,6 °F
Bolpunkto
3273,15 K | 3000 °C | 5432 °F
Varmo de Fuzio
7,7 kJ/mol
Varmo de Vaporiĝo
290 kJ/mol
Specifa Varmo Kapacito
-
Krusta Abundo
Neniu
Universa Abundo
Neniu
Bildaj kreditoj: Wikimedia Commons (Geomartin)
Pitchblende, a uranium ore and the host for most of Earth's promethium
CAS Nombro
7440-12-2
PubChem Kunmetita Identiga Nombro
Neniu
Atomaj Propraĵoj
Atoma Radiuso
183 pm
Kovalenta Radiuso
199 pm
Elektronegativeco
-
Potencialo de jonigo
5,582 eV
Atoma Volumo
22,39 cm3/mol
Termika Kondukto
0,179 W/cm·K
Oksidaj Ŝtatoj
3
Aplikoj
Promethium is also used in atomic batteries for spacecraft and guided missiles.
Promethium is also used to measure the thickness of materials by evaluating the amount of radiation from a promethium source that passes through the sample.
It has possible future uses in portable X-ray sources, and as auxiliary heat or power sources for space probes and satellites.
Promethium is also used to measure the thickness of materials by evaluating the amount of radiation from a promethium source that passes through the sample.
It has possible future uses in portable X-ray sources, and as auxiliary heat or power sources for space probes and satellites.
Promethium is harmful due to its radioactivity
Izotopoj
Stabilaj Izotopoj
-Malstabilaj Isotopoj
126Pm, 127Pm, 128Pm, 129Pm, 130Pm, 131Pm, 132Pm, 133Pm, 134Pm, 135Pm, 136Pm, 137Pm, 138Pm, 139Pm, 140Pm, 141Pm, 142Pm, 143Pm, 144Pm, 145Pm, 146Pm, 147Pm, 148Pm, 149Pm, 150Pm, 151Pm, 152Pm, 153Pm, 154Pm, 155Pm, 156Pm, 157Pm, 158Pm, 159Pm, 160Pm, 161Pm, 162Pm, 163Pm